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          LV16-25-OLED-02-8080时序驱动OLED
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              <table>    <tr>        <td align="center" width=150px>Windows</td>        <td align="left">windows11</td>    </tr>    <tr>        <td align="center">Ubuntu</td>        <td align="left">Ubuntu16.04的64位版本</td>      </tr>    <tr>        <td align="center">VMware® Workstation 16 Pro</td>        <td align="left">16.2.3 build-19376536</td>      </tr>    <tr>        <td align="center">SecureCRT</td>        <td align="left">Version 8.7.2 (x64 build 2214)   -   正式版-2020年5月14日</td>      </tr>    <tr>        <td align="center">开发板</td>        <td align="left">正点原子 i.MX6ULL Linux阿尔法开发板</td>      </tr>    <tr>        <td align="center">uboot</td>        <td align="left">NXP官方提供的uboot，NXP提供的版本为uboot-imx-rel_imx_4.1.15_2.1.0_ga(使用的uboot版本为U-Boot 2016.03)</td>      </tr>    <tr>        <td align="center">linux内核</td>        <td align="left">linux-4.15(NXP官方提供)</td>      </tr>    <tr>        <td align="center">STM32开发板</td>        <td align="left">正点原子战舰V3(STM32F103ZET6)</td>      </tr></table>
              </div>
            </details>

<details class="folding-tag" blue><summary> 点击查看本文参考资料 </summary>
              <div class='content'>
              <ul><li>通用</li></ul><table><tr><td align="center">分类  </td><td align="center">网址</td><td align="center">说明</td></tr><tr><td align="center" rowspan="4">官方网站</td><td align="left"><a href="https://www.arm.com/" target="_blank">https://www.arm.com/</a></td><td align="left">ARM官方网站，在这里我们可以找到Cotex-Mx以及ARMVx的一些文档</td></tr><tr>                                            <td align="left"><a href="https://www.st.com/content/st_com/zh.html" target="_blank">https://www.st.com/content/st_com/zh.html</a></td><td align="left">ST官方网站，在这里我们可以找到STM32的相关文档</td></tr><tr>                                            <td align="left"><a href="https://www.stmcu.com.cn/" target="_blank">https://www.stmcu.com.cn/</a></td><td align="left">意法半导体ST中文官方网站，在这里我们可以找到STM32的相关中文参考文档</td></tr><tr>                                            <td align="left"><a href="http://elm-chan.org/fsw/ff/00index_e.html" target="_blank">http://elm-chan.org/fsw/ff/00index_e.html</a></td><td align="left">FatFs文件系统官网</td></tr><tr><td align="center" rowspan="3">教程书籍</td><td align="left"><a href="STM32开发相关资料/01ARM参考资料/ARM Cortex-M3权威指南(中文).pdf" target="_blank">《ARM Cortex-M3权威指南》</a></td><td alirn="left" rowspan="3">ARM公司专家Joseph Yiu（姚文祥）的力作，中文翻译是NXP的宋岩</td></tr><tr>                                            <td align="left"><a href="STM32开发相关资料/01ARM参考资料/ARM Cortex-M0权威指南(中文).pdf" target="_blank">《ARM Cortex-M0权威指南》</a></td></tr><tr>                                            <td align="left"><a href="" target="_blank">《ARM Cortex-M3与Cortex-M4权威指南》</a></td></tr><tr><td align="center" rowspan="4">开发论坛</td><td align="left"><a href="http://47.111.11.73/forum.php" target="_blank">http://47.111.11.73/forum.php</a></td><td align="left">开源电子网，正点原子的资料下载及问题讨论论坛</td></tr><tr>                                            <td align="left"><a href="https://www.firebbs.cn/forum.php" target="_blank">https://www.firebbs.cn/forum.php</a></td><td align="left">国内Kinetis开发板-野火/秉火（刘火良）主持的论坛，现也做STM32和i.MX RT</td></tr><tr>                                            <td align="left"><a href="https://www.amobbs.com/index.php" target="_blank">https://www.amobbs.com/index.php</a></td><td align="left">阿莫（莫进明）主持的论坛，号称国内最早最火的电子论坛，以交流Atmel AVR系列单片机起家，现已拓展到嵌入式全平台，其STM32系列帖子有70W+。</td></tr><tr>                                            <td align="left"><a href="http://download.100ask.net/index.html" target="_blank">http://download.100ask.net/index.html</a></td><td align="left">韦东山嵌入式资料中心，有些STM32和linux的相关资料也可以来这里找。</td></tr><tr><td align="center" rowspan="3">博客参考</td><td align="left"><a href="http://www.openedv.com/" target="_blank">http://www.openedv.com/</a></td><td align="left">开源网-原子哥个人博客</td></tr><tr>                                            <td align="left"><a href="http://blog.chinaaet.com/jihceng0622" target="_blank">http://blog.chinaaet.com/jihceng0622</a></td><td align="left">博主是原Freescale现NXP的现场应用工程师</td></tr><tr>                                            <td align="left"><a href="https://community.arm.com/arm-community-blogs/b/architectures-and-processors-blog/posts/cortex-m-resources" target="_blank">cortex-m-resources</a></td><td align="left">这其实并不算是一个博客，这是ARM公司专家Joseph Yiu收集整理的所有对开发者有用的官方Cortex-M资料链接（也包含极少数外部资源链接）</td></tr></table><ul><li>STM32</li></ul><table>    <tr><td align="center" rowspan="2">STM32</td><td align="left"><a href="https://doc.embedfire.com/mcu/stm32/f103/hal_general/zh/latest/index.html" target="_blank">STM32 HAL库开发实战指南——基于F103系列开发板</a></td><td align="left">野火STM32开发教程在线文档</td></tr><tr>                                            <td align="left"><a href="https://doc.embedfire.com/mcu/stm32/f103badao/std/zh/latest/index.html" target="_blank">STM32库开发实战指南——基于野火霸道开发板</a></td><td align="left">野火STM32开发教程在线文档</td></tr></table><ul><li>SD卡</li></ul><table>    <tr><td align="left"><a href="https://www.sdcard.org/" target="_blank">SD Association</a></td><td align="left">提供了SD存储卡和SDIO卡系统规范</td></tr></table>
              </div>
            </details>

<details class="folding-tag" blue><summary> 点击查看相关文件下载 </summary>
              <div class='content'>
              <table>    <tr><td align="left"><a href="https://www.st.com/resource/en/datasheet/stm32f103ze.pdf" target="_blank">STM32F103xx英文数据手册</a></td><td align="left">STM32F103xC/D/E系列的英文数据手册</td></tr>    <tr><td align="left"><a href="https://www.stmcu.com.cn/Designresource/detail/localization_document%20/709978" target="_blank">STM32F103xx中文数据手册</a></td><td align="left">STM32F103xC/D/E系列的中文数据手册</td></tr>    <tr><td align="left"><a href="https://www.st.com/resource/en/reference_manual/rm0008-stm32f101xx-stm32f102xx-stm32f103xx-stm32f105xx-and-stm32f107xx-advanced-armbased-32bit-mcus-stmicroelectronics.pdf" target="_blank">STM32F10xxx英文参考手册（RM0008）</a></td><td align="left">STM32F10xxx系列的英文参考手册</td></tr>    <tr><td align="left"><a href="https://www.stmcu.com.cn/Designresource/detail/localization_document%20/710001" target="_blank">STM32F10xxx中文参考手册（RM0008）</a></td><td align="left">STM32F10xxx系列的中文参考手册</td></tr>    <tr><td align="left"><a href="https://developer.arm.com/documentation/100165/0201/?lang=en" target="_blank">Arm Cortex-M3 处理器技术参考手册-英文版</a></td><td align="left">Cortex-M3技术参考手册-英文版</td></tr>    <tr><td align="left"><a href="https://www.st.com/resource/en/programming_manual/pm0056-stm32f10xxx20xxx21xxxl1xxxx-cortexm3-programming-manual-stmicroelectronics.pdf" target="_blank">STM32F10xxx Cortex-M3编程手册-英文版(PM0056)</a></td><td align="left">STM32F10xxx/20xxx/21xxx/L1xxxx系列Cortex-M3编程手册-英文版</td></tr>    <tr><td align="left"><a href="https://www.sdcard.org/downloads/pls/" target="_blank">SD卡相关资料——最新版本</a></td><td align="left">有关SD卡的一些资料可以从这里下载</td></tr>    <tr><td align="left"><a href="https://www.sdcard.org/downloads/pls/archives/" target="_blank">SD卡相关资料——历史版本</a></td><td align="left">有关SD卡的一些历史版本资料可以从这里下载，比如后边看的SD卡2.0协议</td></tr>    <tr><td align="left"><a href="./" target="_blank">SD 2.0 协议标准完整版</a></td><td align="left">这是一篇关于SD卡2.0协议的中文文档，还是比较有参考价值的，可以一看</td></tr></table>
              </div>
            </details> 

<p>本节笔记放在这里，主要是为了学习8080时序，为后边FSMC产生8080时序做铺垫，这一部分的笔记是用GPIO模拟8080时序，这样对8080时序的认识会更深刻一些。由于我没有8080并口的OLED模块，所以还是以正点原子的OLED模块来进行时序的模拟。</p>
<h1 id="一、硬件设计"><a href="#一、硬件设计" class="headerlink" title="一、硬件设计"></a><font size=3>一、硬件设计</font></h1><img data-src="https://fanhua-picture.oss-cn-hangzhou.aliyuncs.com/01%E5%B5%8C%E5%85%A5%E5%BC%8F%E5%BC%80%E5%8F%91/01HQ%E8%AF%BE%E7%A8%8B%E4%BD%93%E7%B3%BB/LV16-STM32%E5%BC%80%E5%8F%91/LV16-25-OLED-02-8080%E6%97%B6%E5%BA%8F%E9%A9%B1%E5%8A%A8OLED/img/image-20230516234228390.png" alt="image-20230516234228390" style="zoom:50%;" />

<p>（1）CS： OLED 片选信号，对应 PD6。</p>
<p>（2）WR：向 OLED 写入数据，对应 PG14。</p>
<p>（3）RD：从 OLED 读取数据，对应 PG13。</p>
<p>（4）D[7： 0]： 8 位双向数据线，对应 PC[7： 0] 。</p>
<p>（5）RST(RES)：硬复位 OLED，对应 PG15。</p>
<p>（6）DC：命令&#x2F;数据标志（0，读写命令； 1，读写数据），对应 PD3  。  </p>
<h1 id="二、STM32CubeMX配置"><a href="#二、STM32CubeMX配置" class="headerlink" title="二、STM32CubeMX配置"></a><font size=3>二、STM32CubeMX配置</font></h1><h2 id="1-GPIO配置"><a href="#1-GPIO配置" class="headerlink" title="1. GPIO配置"></a><font size=3>1. GPIO配置</font></h2><p>由于我们是模拟8080时序，所以只需要配置GPIO就可以了。</p>
<img data-src="https://fanhua-picture.oss-cn-hangzhou.aliyuncs.com/01%E5%B5%8C%E5%85%A5%E5%BC%8F%E5%BC%80%E5%8F%91/01HQ%E8%AF%BE%E7%A8%8B%E4%BD%93%E7%B3%BB/LV16-STM32%E5%BC%80%E5%8F%91/LV16-25-OLED-02-8080%E6%97%B6%E5%BA%8F%E9%A9%B1%E5%8A%A8OLED/img/image-20230517070903408.png" alt="image-20230517070903408" style="zoom:50%;" />

<h2 id="2-时钟树"><a href="#2-时钟树" class="headerlink" title="2. 时钟树"></a><font size=3>2. 时钟树</font></h2><img data-src="https://fanhua-picture.oss-cn-hangzhou.aliyuncs.com/01%E5%B5%8C%E5%85%A5%E5%BC%8F%E5%BC%80%E5%8F%91/01HQ%E8%AF%BE%E7%A8%8B%E4%BD%93%E7%B3%BB/LV16-STM32%E5%BC%80%E5%8F%91/LV16-25-OLED-02-8080%E6%97%B6%E5%BA%8F%E9%A9%B1%E5%8A%A8OLED/img/image-20230517071017083.png" alt="image-20230517071017083" style="zoom:50%;" />

<h1 id="三、OLED显示实现"><a href="#三、OLED显示实现" class="headerlink" title="三、OLED显示实现"></a><font size=3>三、OLED显示实现</font></h1><h2 id="1-宏定义"><a href="#1-宏定义" class="headerlink" title="1. 宏定义"></a><font size=3>1. 宏定义</font></h2><figure class="highlight c"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">//---------------------------OLED端口定义--------------------------  					   </span></span><br><span class="line"><span class="meta">#<span class="keyword">define</span> OLED_CS  PDout(6)</span></span><br><span class="line"><span class="meta">#<span class="keyword">define</span> OLED_RST PGout(15) 	</span></span><br><span class="line"><span class="meta">#<span class="keyword">define</span> OLED_DC  PDout(3)</span></span><br><span class="line"><span class="meta">#<span class="keyword">define</span> OLED_WR  PGout(14)		  </span></span><br><span class="line"><span class="meta">#<span class="keyword">define</span> OLED_RD  PGout(13)	  </span></span><br><span class="line"></span><br><span class="line"><span class="meta">#<span class="keyword">define</span> DATAOUT(x) GPIOC-&gt;ODR=(GPIOC-&gt;ODR&amp;0xff00)|(x&amp;0x00FF); <span class="comment">//输出,PC0~7,作为数据线</span></span></span><br><span class="line"></span><br><span class="line"><span class="meta">#<span class="keyword">define</span> OLED_CMD  0	<span class="comment">// 写命令</span></span></span><br><span class="line"><span class="meta">#<span class="keyword">define</span> OLED_DATA 1	<span class="comment">// 写数据</span></span></span><br><span class="line"></span><br><span class="line"><span class="type">uint8_t</span> OLED_GRAM[<span class="number">128</span>][<span class="number">8</span>];	<span class="comment">// 定义显存大小，要放在.c源文件中</span></span><br></pre></td></tr></table></figure>

<h2 id="2-基本驱动函数实现"><a href="#2-基本驱动函数实现" class="headerlink" title="2. 基本驱动函数实现"></a><font size=3>2. 基本驱动函数实现</font></h2><h3 id="2-1-GPIO初始化"><a href="#2-1-GPIO初始化" class="headerlink" title="2.1 GPIO初始化"></a><font size=3>2.1 GPIO初始化</font></h3><p>首先肯定是我们引脚的初始化啦，由于是模拟8080时序，所以都是设置成推挽输出模式。</p>
<figure class="highlight c"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br></pre></td><td class="code"><pre><span class="line"><span class="type">void</span> <span class="title function_">MX_GPIO_Init</span><span class="params">(<span class="type">void</span>)</span></span><br><span class="line">&#123;</span><br><span class="line"></span><br><span class="line">  GPIO_InitTypeDef GPIO_InitStruct = &#123;<span class="number">0</span>&#125;;</span><br><span class="line"></span><br><span class="line">  <span class="comment">/* GPIO Ports Clock Enable */</span></span><br><span class="line">  __HAL_RCC_GPIOC_CLK_ENABLE();</span><br><span class="line">  __HAL_RCC_GPIOD_CLK_ENABLE();</span><br><span class="line">  __HAL_RCC_GPIOG_CLK_ENABLE();</span><br><span class="line"></span><br><span class="line">  <span class="comment">/*Configure GPIO pin Output Level */</span></span><br><span class="line">  HAL_GPIO_WritePin(GPIOC, GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3|GPIO_PIN_4|GPIO_PIN_5|GPIO_PIN_6|GPIO_PIN_7, GPIO_PIN_RESET);</span><br><span class="line">  HAL_GPIO_WritePin(GPIOD, GPIO_PIN_3|GPIO_PIN_6, GPIO_PIN_SET);</span><br><span class="line">  HAL_GPIO_WritePin(GPIOG, GPIO_PIN_13|GPIO_PIN_14|GPIO_PIN_15, GPIO_PIN_SET);</span><br><span class="line"></span><br><span class="line">  <span class="comment">/*Configure GPIO pins : PC0 PC1 PC2 PC3 PC4 PC5 PC6 PC7 */</span></span><br><span class="line">  GPIO_InitStruct.Pin = GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3</span><br><span class="line">                          |GPIO_PIN_4|GPIO_PIN_5|GPIO_PIN_6|GPIO_PIN_7;</span><br><span class="line">  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;</span><br><span class="line">  GPIO_InitStruct.Pull = GPIO_PULLUP;</span><br><span class="line">  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;</span><br><span class="line">  HAL_GPIO_Init(GPIOC, &amp;GPIO_InitStruct);</span><br><span class="line"></span><br><span class="line">  <span class="comment">/*Configure GPIO pins : PD3 PD6 */</span></span><br><span class="line">  GPIO_InitStruct.Pin = GPIO_PIN_3|GPIO_PIN_6;</span><br><span class="line">  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;</span><br><span class="line">  GPIO_InitStruct.Pull = GPIO_PULLUP;</span><br><span class="line">  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;</span><br><span class="line">  HAL_GPIO_Init(GPIOD, &amp;GPIO_InitStruct);</span><br><span class="line"></span><br><span class="line">  <span class="comment">/*Configure GPIO pins : PG13 PG14 PG15 */</span></span><br><span class="line">  GPIO_InitStruct.Pin = GPIO_PIN_13|GPIO_PIN_14|GPIO_PIN_15;</span><br><span class="line">  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;</span><br><span class="line">  GPIO_InitStruct.Pull = GPIO_PULLUP;</span><br><span class="line">  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;</span><br><span class="line">  HAL_GPIO_Init(GPIOG, &amp;GPIO_InitStruct);</span><br><span class="line"></span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>

<h3 id="2-2-向SSD1306写一个字节数据"><a href="#2-2-向SSD1306写一个字节数据" class="headerlink" title="2.2 向SSD1306写一个字节数据"></a><font size=3>2.2 向SSD1306写一个字节数据</font></h3><img data-src="https://fanhua-picture.oss-cn-hangzhou.aliyuncs.com/01%E5%B5%8C%E5%85%A5%E5%BC%8F%E5%BC%80%E5%8F%91/01HQ%E8%AF%BE%E7%A8%8B%E4%BD%93%E7%B3%BB/LV16-STM32%E5%BC%80%E5%8F%91/LV16-25-OLED-02-8080%E6%97%B6%E5%BA%8F%E9%A9%B1%E5%8A%A8OLED/img/image-20230517071725760.png" alt="image-20230517071725760" style="zoom:50%;" />

<figure class="highlight c"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br></pre></td><td class="code"><pre><span class="line"><span class="type">void</span> <span class="title function_">OLED_WR_Byte</span><span class="params">(<span class="type">uint8_t</span> dat,<span class="type">uint8_t</span> cmd)</span></span><br><span class="line">&#123;</span><br><span class="line">	DATAOUT(dat);   <span class="comment">// STM32向D[7:0]输出数据</span></span><br><span class="line"> 	OLED_DC = cmd;  <span class="comment">// 选择写入命令还是写入数据</span></span><br><span class="line">	OLED_CS = <span class="number">0</span>;    <span class="comment">// 拉低片选，选中SSD1306</span></span><br><span class="line">	OLED_WR = <span class="number">0</span>;    <span class="comment">// 拉低写使能信号，准备开始写入数据到OLED</span></span><br><span class="line">	OLED_WR = <span class="number">1</span>;    <span class="comment">// 拉高写使能信号，将数据从D[7:0]写入OLED</span></span><br><span class="line">	OLED_CS = <span class="number">1</span>;    <span class="comment">// 拉高片选，结束读写</span></span><br><span class="line">	OLED_DC = <span class="number">1</span>;    <span class="comment">// 命令数据选择位置1</span></span><br><span class="line">&#125; </span><br></pre></td></tr></table></figure>

<p><strong>【函数说明】</strong>向SSD1306写入一个字节的数据，可以是命令也可以是数据，毕竟命令其实也是特殊的数据嘛。</p>
<p><strong>【参数说明】</strong></p>
<ul>
<li>dat ：要写入的数据&#x2F;命令</li>
<li>cmd ：数据&#x2F;命令标志。0，表示命令;1，表示数据;</li>
</ul>
<h3 id="2-3-更新GRAM数据到OLED"><a href="#2-3-更新GRAM数据到OLED" class="headerlink" title="2.3 更新GRAM数据到OLED"></a><font size=3>2.3 更新GRAM数据到OLED</font></h3><p>SSD1306是自带显存的，我们将数据写入到显存后，还需要将数据刷新到OLED显示，这样才能真正实现OLED的显示。</p>
<img data-src="https://fanhua-picture.oss-cn-hangzhou.aliyuncs.com/01%E5%B5%8C%E5%85%A5%E5%BC%8F%E5%BC%80%E5%8F%91/01HQ%E8%AF%BE%E7%A8%8B%E4%BD%93%E7%B3%BB/LV16-STM32%E5%BC%80%E5%8F%91/LV16-25-OLED-02-8080%E6%97%B6%E5%BA%8F%E9%A9%B1%E5%8A%A8OLED/img/image-20230517073042408.png" alt="image-20230517073042408" style="zoom:50%;" />

<figure class="highlight c"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br></pre></td><td class="code"><pre><span class="line"><span class="type">void</span> <span class="title function_">OLED_Refresh_Gram</span><span class="params">(<span class="type">void</span>)</span></span><br><span class="line">&#123;</span><br><span class="line">    <span class="type">uint8_t</span> i, n;</span><br><span class="line">    <span class="keyword">for</span>(i = <span class="number">0</span>; i &lt; <span class="number">8</span>; i++)</span><br><span class="line">    &#123;</span><br><span class="line">        OLED_WR_Byte (<span class="number">0xb0</span> + i, OLED_CMD); <span class="comment">//设置页地址（0~7）</span></span><br><span class="line">        OLED_WR_Byte (<span class="number">0x00</span>, OLED_CMD);     <span class="comment">//设置显示位置—列低地址</span></span><br><span class="line">        OLED_WR_Byte (<span class="number">0x10</span>, OLED_CMD);     <span class="comment">//设置显示位置—列高地址</span></span><br><span class="line">        <span class="keyword">for</span>(n = <span class="number">0</span>; n &lt; <span class="number">128</span>; n++)</span><br><span class="line">            OLED_WR_Byte(OLED_GRAM[n][i], OLED_DATA);</span><br><span class="line">    &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>

<p><strong>【函数说明】</strong>我们在 STM32F1内部定义了一个块GRAM：OLED_GRAM[128][8]此部分 GRAM 对应 OLED 模块上的 GRAM。在操作的时候，我们只要修改 STM32F1 内部的 GRAM 就可以了，然后通过 OLED_Refresh_Gram 函数把 GRAM 一次刷新到 OLED 的 GRAM 上。函数数先设置页地址，然后写入列地址（也就是纵坐标），然后从 0 开始写入 128 个字节，写满该页，最后循环把 8 页的内容都写入，就实现了整个从 STM32F1 显存到 OLED 显存的拷贝。    </p>
<h3 id="2-4-OLED清屏"><a href="#2-4-OLED清屏" class="headerlink" title="2.4 OLED清屏"></a><font size=3>2.4 OLED清屏</font></h3><figure class="highlight c"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br></pre></td><td class="code"><pre><span class="line"><span class="type">void</span> <span class="title function_">OLED_Clear</span><span class="params">(<span class="type">void</span>)</span></span><br><span class="line">&#123;</span><br><span class="line">    <span class="type">uint8_t</span> i, n;</span><br><span class="line">    <span class="keyword">for</span>(i = <span class="number">0</span>; i &lt; <span class="number">8</span>; i++)</span><br><span class="line">    &#123;</span><br><span class="line">        <span class="keyword">for</span>(n = <span class="number">0</span>; n &lt; <span class="number">128</span>; n++)</span><br><span class="line">        &#123;</span><br><span class="line">            OLED_GRAM[n][i] = <span class="number">0X00</span>;</span><br><span class="line">        &#125;</span><br><span class="line">    &#125;</span><br><span class="line">    OLED_Refresh_Gram();<span class="comment">//更新显示</span></span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>

<p>【函数说明】清屏函数,清完屏,整个屏幕是黑色的!和没点亮一样。</p>
<h3 id="2-5-SSD1306初始化"><a href="#2-5-SSD1306初始化" class="headerlink" title="2.5 SSD1306初始化"></a><font size=3>2.5 SSD1306初始化</font></h3><p>上边相关的驱动函数实现完毕后，就需要来初始化和配置我们的SSD1306啦：</p>
<figure class="highlight c"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">//初始化SSD1306					    </span></span><br><span class="line"><span class="type">void</span> <span class="title function_">OLED_Init</span><span class="params">(<span class="type">void</span>)</span></span><br><span class="line">&#123; 	 		 </span><br><span class="line">    MX_GPIO_Init();	</span><br><span class="line">    </span><br><span class="line">	OLED_WR=<span class="number">1</span>;</span><br><span class="line">  	OLED_RD=<span class="number">1</span>; </span><br><span class="line">	OLED_CS=<span class="number">1</span>;</span><br><span class="line">	OLED_DC=<span class="number">1</span>;	 </span><br><span class="line">	OLED_RST=<span class="number">0</span>;</span><br><span class="line">	HAL_Delay(<span class="number">100</span>);</span><br><span class="line">	OLED_RST=<span class="number">1</span>; </span><br><span class="line">					  </span><br><span class="line">	OLED_WR_Byte(<span class="number">0xAE</span>,OLED_CMD); <span class="comment">//关闭显示</span></span><br><span class="line">	OLED_WR_Byte(<span class="number">0xD5</span>,OLED_CMD); <span class="comment">//设置时钟分频因子,震荡频率</span></span><br><span class="line">	OLED_WR_Byte(<span class="number">80</span>,OLED_CMD);   <span class="comment">//[3:0],分频因子;[7:4],震荡频率</span></span><br><span class="line">	OLED_WR_Byte(<span class="number">0xA8</span>,OLED_CMD); <span class="comment">//设置驱动路数</span></span><br><span class="line">	OLED_WR_Byte(<span class="number">0X3F</span>,OLED_CMD); <span class="comment">//默认0X3F(1/64) </span></span><br><span class="line">	OLED_WR_Byte(<span class="number">0xD3</span>,OLED_CMD); <span class="comment">//设置显示偏移</span></span><br><span class="line">	OLED_WR_Byte(<span class="number">0X00</span>,OLED_CMD); <span class="comment">//默认为0</span></span><br><span class="line">	OLED_WR_Byte(<span class="number">0x40</span>,OLED_CMD); <span class="comment">//设置显示开始行 [5:0],行数.										    </span></span><br><span class="line">	OLED_WR_Byte(<span class="number">0x8D</span>,OLED_CMD); <span class="comment">//电荷泵设置</span></span><br><span class="line">	OLED_WR_Byte(<span class="number">0x14</span>,OLED_CMD); <span class="comment">//bit2，开启/关闭</span></span><br><span class="line">	OLED_WR_Byte(<span class="number">0x20</span>,OLED_CMD); <span class="comment">//设置内存地址模式</span></span><br><span class="line">	OLED_WR_Byte(<span class="number">0x02</span>,OLED_CMD); <span class="comment">//[1:0],00，列地址模式;01，行地址模式;10,页地址模式;默认10;</span></span><br><span class="line">	OLED_WR_Byte(<span class="number">0xA1</span>,OLED_CMD); <span class="comment">//段重定义设置,bit0:0,0-&gt;0;1,0-&gt;127;</span></span><br><span class="line">	OLED_WR_Byte(<span class="number">0xC0</span>,OLED_CMD); <span class="comment">//设置COM扫描方向;bit3:0,普通模式;1,重定义模式 COM[N-1]-&gt;COM0;N:驱动路数</span></span><br><span class="line">	OLED_WR_Byte(<span class="number">0xDA</span>,OLED_CMD); <span class="comment">//设置COM硬件引脚配置</span></span><br><span class="line">	OLED_WR_Byte(<span class="number">0x12</span>,OLED_CMD); <span class="comment">//[5:4]配置	 </span></span><br><span class="line">	OLED_WR_Byte(<span class="number">0x81</span>,OLED_CMD); <span class="comment">//对比度设置</span></span><br><span class="line">	OLED_WR_Byte(<span class="number">0xEF</span>,OLED_CMD); <span class="comment">//1~255;默认0X7F (亮度设置,越大越亮)</span></span><br><span class="line">	OLED_WR_Byte(<span class="number">0xD9</span>,OLED_CMD); <span class="comment">//设置预充电周期</span></span><br><span class="line">	OLED_WR_Byte(<span class="number">0xf1</span>,OLED_CMD); <span class="comment">//[3:0],PHASE 1;[7:4],PHASE 2;</span></span><br><span class="line">	OLED_WR_Byte(<span class="number">0xDB</span>,OLED_CMD); <span class="comment">//设置VCOMH 电压倍率</span></span><br><span class="line">	OLED_WR_Byte(<span class="number">0x30</span>,OLED_CMD); <span class="comment">//[6:4] 000,0.65*vcc;001,0.77*vcc;011,0.83*vcc;</span></span><br><span class="line">	OLED_WR_Byte(<span class="number">0xA4</span>,OLED_CMD); <span class="comment">//全局显示开启;bit0:1,开启;0,关闭;(白屏/黑屏)</span></span><br><span class="line">	OLED_WR_Byte(<span class="number">0xA6</span>,OLED_CMD); <span class="comment">//设置显示方式;bit0:1,反相显示;0,正常显示	    						   </span></span><br><span class="line">	OLED_WR_Byte(<span class="number">0xAF</span>,OLED_CMD); <span class="comment">//开启显示	 </span></span><br><span class="line">	OLED_Clear();</span><br><span class="line">&#125; </span><br></pre></td></tr></table></figure>

<p><strong>【函数说明】</strong>上边的这些个命令，一般厂家都会提供给我们，我们直接按照厂家给的进行初始化就可以了。详细的每个命令可以干什么我们可以查看[SSD1306_datasheet](.&#x2F;STM32开发相关资料&#x2F;02显示屏参考资料&#x2F;OLED参考资料&#x2F;01-SSD1306-Revision 1.1 (Charge Pump).pdf)的9 COMMAND TABLE 和 10 COMMAND DESCRIPTIONS  。</p>
<h3 id="2-6-OLED显示开关"><a href="#2-6-OLED显示开关" class="headerlink" title="2.6 OLED显示开关"></a><font size=3>2.6 OLED显示开关</font></h3><h4 id="2-6-1-开启OLED显示"><a href="#2-6-1-开启OLED显示" class="headerlink" title="2.6.1 开启OLED显示"></a><font size=3>2.6.1 开启OLED显示</font></h4><figure class="highlight c"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">//开启OLED显示</span></span><br><span class="line"><span class="type">void</span> <span class="title function_">OLED_Display_On</span><span class="params">(<span class="type">void</span>)</span></span><br><span class="line">&#123;</span><br><span class="line">    OLED_WR_Byte(<span class="number">0X8D</span>, OLED_CMD); <span class="comment">//SET DCDC命令</span></span><br><span class="line">    OLED_WR_Byte(<span class="number">0X14</span>, OLED_CMD); <span class="comment">//DCDC ON</span></span><br><span class="line">    OLED_WR_Byte(<span class="number">0XAF</span>, OLED_CMD); <span class="comment">//DISPLAY ON</span></span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>

<h4 id="2-6-2-关闭OLED显示"><a href="#2-6-2-关闭OLED显示" class="headerlink" title="2.6.2 关闭OLED显示"></a><font size=3>2.6.2 关闭OLED显示</font></h4><figure class="highlight c"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">//关闭OLED显示</span></span><br><span class="line"><span class="type">void</span> <span class="title function_">OLED_Display_Off</span><span class="params">(<span class="type">void</span>)</span></span><br><span class="line">&#123;</span><br><span class="line">    OLED_WR_Byte(<span class="number">0X8D</span>, OLED_CMD); <span class="comment">//SET DCDC命令</span></span><br><span class="line">    OLED_WR_Byte(<span class="number">0X10</span>, OLED_CMD); <span class="comment">//DCDC OFF</span></span><br><span class="line">    OLED_WR_Byte(<span class="number">0XAE</span>, OLED_CMD); <span class="comment">//DISPLAY OFF</span></span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>

<h2 id="3-应用函数的实现"><a href="#3-应用函数的实现" class="headerlink" title="3. 应用函数的实现"></a><font size=3>3. 应用函数的实现</font></h2><p>应用函数主要是指完成画点，画线，显示字符等一系列的操作。不过这里暂时只写了一个画点函数，因为目前这一部分还不是重点，后边会再补充这里的笔记。</p>
<h3 id="3-1-画点函数"><a href="#3-1-画点函数" class="headerlink" title="3.1 画点函数"></a><font size=3>3.1 画点函数</font></h3><img data-src="https://fanhua-picture.oss-cn-hangzhou.aliyuncs.com/01%E5%B5%8C%E5%85%A5%E5%BC%8F%E5%BC%80%E5%8F%91/01HQ%E8%AF%BE%E7%A8%8B%E4%BD%93%E7%B3%BB/LV16-STM32%E5%BC%80%E5%8F%91/LV16-25-OLED-02-8080%E6%97%B6%E5%BA%8F%E9%A9%B1%E5%8A%A8OLED/img/image-20230517221918887.png" alt="image-20230517221918887" style="zoom: 67%;" />

<p>OLED_GRAM[128][8]中的 128 代表列数（x 坐标），而 8 代表的是页， 每页又包含 8 行，总共 64 行（y 坐标）。从高到低对应行数从小到大。比如，我们要在 x&#x3D;100， y&#x3D;29 这个点写入1，则可以用这个语句实现：</p>
<figure class="highlight c"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">OLED_GRAM[<span class="number">100</span>][<span class="number">4</span>]|=<span class="number">1</span>&lt;&lt;<span class="number">2</span>；</span><br></pre></td></tr></table></figure>

<p>所以一个通用的在点（x， y）置 1 表达式为 ：</p>
<figure class="highlight c"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">OLED_GRAM[x][<span class="number">7</span>-y/<span class="number">8</span>]|=<span class="number">1</span>&lt;&lt;(<span class="number">7</span>-y%<span class="number">8</span>);<span class="comment">// 其中 x 的范围为： 0~127； y 的范围为： 0~63。</span></span><br></pre></td></tr></table></figure>

<p>所以我们可以写出这样一个画点的函数：</p>
<figure class="highlight c"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">//画点</span></span><br><span class="line"><span class="type">void</span> <span class="title function_">OLED_DrawPoint</span><span class="params">(<span class="type">uint8_t</span> x, <span class="type">uint8_t</span> y, <span class="type">uint8_t</span> t)</span></span><br><span class="line">&#123;</span><br><span class="line">    <span class="type">uint8_t</span> pos, bx, temp = <span class="number">0</span>;</span><br><span class="line">    <span class="keyword">if</span>(x &gt; <span class="number">127</span> || y &gt; <span class="number">63</span>)<span class="keyword">return</span>; <span class="comment">//超出范围了.</span></span><br><span class="line">    pos = <span class="number">7</span> - y / <span class="number">8</span>;</span><br><span class="line">    bx = y % <span class="number">8</span>;</span><br><span class="line">    temp = <span class="number">1</span> &lt;&lt; (<span class="number">7</span> - bx);</span><br><span class="line">    <span class="keyword">if</span>(t)OLED_GRAM[x][pos] |= temp;</span><br><span class="line">    <span class="keyword">else</span> OLED_GRAM[x][pos] &amp;= ~temp;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>

<p><strong>【函数说明】</strong>这个函数可以实现在OLED的画一个点，其实就是点亮指定位置的像素点。</p>
<p><strong>【参数说明】</strong></p>
<ul>
<li>x ：横向的坐标，可以看做是列坐标，就是在第几列，范围是0~127</li>
<li>y ：纵向的坐标，可以看做是行坐标，就是在第几行，范围是0~63</li>
<li>t ：表示是点亮这个点，还是说清空这个点（熄灭），1 表示填充；0表示清空。</li>
</ul>

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    <p><span>文章标题:</span><a href="/post/9d8b4ebe.html">LV16-25-OLED-02-8080时序驱动OLED</a></p>
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